5. 3 * 3 = 9
4 * 4 = 16
3 * 3,5 = 10, 5
3 + 4 + 3 = 10 kg
9 + 16 + 10, 5 = 35,5 lei
35,5 : 10 = 3,55 lei/kg media
6. 8 * 9000 = 72000
10 * 11000 = 110000
12 * 14000 = 168000
8 + 10 + 12 = 30 ha
72000 + 110000 + 168000 = 350000 kg
350000 : 30 = 1166,(6) kg/ha media
